The 10 hours maybe was and exaggeration lol. It honestly took about 5.5-6ish hours 7pm-2am (and this included about an hour break for lunch a few beer breaks and looking for stuff to cut the plastic with) You are right it took about 30 to take the stock one out and we did this with the bumper on. We took the bumper off so we could have an easier time trimming everything. It took us almost an hour to get the one-time crimpped oem piping off the passenger side. Once we got all the oem piping off it took, everything was pretty much straight forward.

What did you use to get it off? I just used a dremel cut off wheel, off in under a minute.